For the sake of relevancy, 6'4", 200lbs here.

I have sat, shoehorned myself into a skycouch once when the kids had one as I wanted to see what it's like.
Cramped and uncomfortable was my takeaway.

Premium economy works much better for me as I can totally stretch out, albeit on a slant, with the seat in front being far enough away it does not encroach into my space. Premium food and beverage service, quieter cabin.